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Andreani, Julien; Khalil, Jacques Yaacoub Bou; Sevvana, Madhumati; Benamar, Samia; Di Pinto, Fabrizio; Bitam, Idir; Colson, Philippe; Klose, Thomas; Rossmann, Michael G; Raoult, Didier; La Scola, Bernard
Journal of virology, 2017-Jul-15, Volume: 91, Issue: 14Journal Article
, a double-stranded DNA virus that infects pigs, is the only known member of the family. Nevertheless, during our isolation and sequencing of the complete genome of faustovirus, followed by the description of kaumoebavirus, carried out over the past 2 years, we observed the emergence of previously unknown related viruses within this group of viruses. Here we describe the isolation of pacmanvirus, a fourth member in this group, which is capable of infecting Pacmanvirus A23 has a linear compact genome of 395,405 bp, with a 33.62% G+C content. The pacmanvirus genome harbors 465 genes, with a high coding density. An analysis of reciprocal best hits shows that 31 genes are conserved between , pacmanvirus, faustovirus, and kaumoebavirus. Moreover, the major capsid protein locus of pacmanvirus appears to be different from those of kaumoebavirus and faustovirus. Overall, comparative and genomic analyses reveal the emergence of a new group or cluster of viruses encompassing , faustovirus, pacmanvirus, and kaumoebavirus. Pacmanvirus is a newly discovered icosahedral double-stranded DNA virus that was isolated from an environmental sample by amoeba coculture. We describe herein its structure and replicative cycle, along with genomic analysis and genomic comparisons with previously known viruses. This virus represents the third virus, after faustovirus and kaumoebavirus, that is most closely related to classical representatives of the family. These results highlight the emergence of previously unknown double-stranded DNA viruses which delineate and extend the diversity of a group around the asfarvirus members.
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